Toolhead lock



Feb. 6, 1945. w. DYSART ETAL TOOL HEAD LOCK Filed Dec. 15, 1943 W L.Dl.sart I AlOlL5OL.Am RS.

MOM

Patented Feb. 6, 1945 z,36s,91e

- TQQLHEAD-LOCKF WilliamJI. Dysart and Alonzo L. Adkins; Lebanon, OhioApplicatiflnneember 15, 19%3, Serial No..5,14,4 14.

6iGlaims (Cl. 306 33') Thisinvention relates to an improved tool headlock particularly adapted for, use in conjunction withcarpenterstOOlSgSllCh asrham ners, hatchet's and the likealthQughnot.limited tosuch use.

As is well known, aisimple metal wedge-has 5 heretofore been widely usedas a means oftlocke ing say a hammer head,or. the,lile on the handletherefor, the wedge bein drivenyinto, the forward end of the handle toexpandlthe ,woodtin the eye of the tool head. However, such expedienthas prover- 1 inefiective and unsatisfactoryv for the-reason that, in agreat many instances; the wedge sooner or latertbecomes loose with theresult that the tool head also becomes looselon the handle An object of;the present;invention,,therefore, is: to provide a; lock embodying auwedge which, underordinaryv use. of: a .tol, -Wil1- not become .loose'and; will permanently and solidly secure-the tool head on thehandletherefo'r.

A further objector theinvention isto provide a wedgewhich, after beindriven into the-for-- ward end of; thetool handle to expandthe woodthereofin'the eye ot the tool head, ;may be distorted to engage thehandle externally of 1 the normal line of the Wedge-fQrdockingthe wedgesolidly in posi ion;

Another .object of theinvention is to,provid,e-a wedge having tongues atopposite edges thereof which;v after thev wedge-has been driven into theforward end, of the handle ma be bent laterally vto project beyond;the.;lines ofkthe vvedge and bite into the wood-of-zthehandle fonlockingthe wedge against retrograde movement, I

Still another obJ' eat-,ofthe -invention ,is '.;to,p ro vide a wedgewherein ashort shoulder will-be provided 'atsthe base oileach tongue tofurnish a fulcrum; so that by hammering against thetongue towardthetipthereof, ;the tongue will be caused to bend laterally outwardnearqthe shoulder: and sinkwintmthewood of, the handlerv Awfurther.object of the invention is to provide a 1 wedge. whereinrthe metal of;the-wedge 'will bemore or less malleable; ascontrasted with a highlyresilient'metal, so that'when :the tongues; are bent laterally toengagevatherwood ;of-;;the handle,

40: e 15 shown as curved 'to'conform t0 the-curvature said tongues willremain in their-{bent or-distorted,

will appear during the course 0f; the following;: description, andinthedrawing;

Figure 1 is a viewpartly= int -sideselevatiom and, partly in sectionshowing; our improvedi-lockiinconjunction with a conventional hammerthis view-illustrating- ,the ,manner in which aapunchgis; used. "tobend; the; tongues ofqthe Wedge laterally; Figure 2 is a view similarto-Figureiland showingthe tongues-bent laterally,

' Figure 3v is a .detailtsideoelevation of the wedge: Figured is:azvertical; transverse sectiomshowza ing the; diagonal. channelsswhich'arezprovidedato: receive; the, punch;v employed: fora:bndinge'the; wedgetonguesh Figure 5' is adetail sideelevatiomshowingcthe tongues bent'flaterally.

Figure 6 fis an edge elevation of: the wedge: Figure 7 'isa top plan;view ofutherwedge: Figure 8 is a perspective-wview :oi theipunchemployed. i r 1 Referring-now more particularly to the-;:draw ing; itwill b'e seen that we have; for'convenience; shown ourimprovedlockingdevice inconjunc tion witha' conventi'onal-hammer embodying the, usualmetal head I 0 'having-an='eye I I to tightly receive the forward end ofthewooden' handle -I 2. As will be understoodas-the descriptionproceeds"; the invention-iswel1 adapted for use in conjunc-- tionwithmany other-tools'and'wedo not; there-"- fore, wish to be'limited in=this respect. a

I, of within-said*eye.- As seen in Figures 3" and 6: of the drawingpthewedge is tapered at= its sides and edges and these 'surfaces'are smoothso-that the wedge maybe readily'driven into'place, In thepresentinstance, the, upper edge of the wedge" of the'upper'face-of thehead I0. Howeventhis detail is immaterial and the uppenedge of the wedgemay be square if so'desired. g

' Suitably. cut or otherwise formed in the wedge" from vthe side edgesthereoft'are'like' diagonal-slots" I 4 which slope downwardly a'ndinwardly toward the tipioftheowedgeat'thesame angle. The'upg- Derends-of thesev slotsifiare. preferably located an,- proximately midwaybetween the ends of "the Wedge. Similarly formed in-the wedge from theside edges thereof a short distance below the slots M are parallel,diagonal slots 15 which are much shorter than the slots l4, say abouthalf as long more or less. The slots l4 may thus be identified as thelong slots'and the slots I as the short slots.

Aswill now be seen, a diagonal tongue I6 is defined betweeneach pair ofslots I4 and I5 and, as will now be appreciated, these tongues [6normally lie flush with the side (faces of the wedge like the tonguesI6, normally conform to the Iv lines of the wedge.

Formed in the wedge from the upper end thereof are intersecting,diagonal channels I8 each sloping from a point near one side edge of thewedge to open at substantially a right angle thereto into the diagonallyopposite slot IB located at the other side edge of the wedge.

These channels enter the slots about midway of the depth thereof.

In conjunction with the wedge I3 we provide a punch I9, seen in detailin Figure 8 of the drawing. The punch may be provided with a knurledstock, and projecting therefrom is a reduced stem of a diameter toremovably fit more or less snugly in either of the channels I8 of thewedge selectively,

It is now to be noted that the wedge I3 is preferably formed of asuitable metal which is more or less malleable, as distinguished from ametal having a pronounced characteristic of resiliency. Thus, when thetongues I6 are bent, they will remain permanently in their bent ordistorted shape instead 06 pronouncedly tending,

as would spring tongues, to flex or spring back to original or normalshape or disposition.

In practical use, the wedge I3 is first driven into the forward end ofthe handle, as seen in Figure 1 of the drawing, so that the wedge liesflush with the upper face of the head I0. The

stem 20 of the punch I9 is then inserted in one of the channels I8 torest against the corresponding tongue I6, after which the punch isstruck with a hammer or the like to pound against the tongue and bendthe tongue laterally into the Wood of the handle. Having bent onetongue, the punch is reversed to extend within, the other of thechannels I8, when the hammering operation is repeated to bend the othertongue laterally into the wood of the handle. As'the stem of the punchselectively fits either channel snugly, the forward end of the stem willbe prevented from riding along the tongues under impact of the hammerblows on the punch.

Assuming the channels I8 to be projected, attention is now directed tothe fact that the slots I5,are of a depth to extend past the lower endsof the channels so that either one or the the tongues will be caused tofurther bend laterally outward and bite into the wood of the handle atthe tips of the tongues, as shown in Figure 2 of the drawing, forlocking the wedge solidly in position.

Having thus described our invention, what we claim is:

' 1. A tool head lock including a wedge adapted -to be driven into theforward end of a handle,

and a tongue carried by the wedge, the wedge being formed with a channeladapted to receive a punch to contact and bend the tongue laterslot andadapted to receive a punch to contact I the tongue after the wedge is inplace for bending the tongue laterally into the material of the handlefor locking the wedge in position.

4. A tool head lock including a wedge adapted to be driven into theforward end of a tool handle and provided at one side edge thereofwith'spaced long and short diagonal slots defining anintervening tongueas well as a shoulder between the short slot and said edge of the wedgebeneath the tongue, the wedge beingformed with a diagonal channelopening into the long slot and adapted to receive a punch to contact thetongue after the wedge is in place andbend the tongue laterally acrosssaid shoulder into the material of the handle for locking the wedge inposition.

5. A tool head lock'including a wedge adapted to be driven into theforward end of "a tool handle and "provided with a channel there-- isdriven into position.

through leading from the outer end'of the wedge and with a tongueopposite the inner end of said channel whereby a tool may be inserted insaid channel to engage and bend the tongueinto the material of thehandle after'the Wedge 6. A tool head lock including a wedge of normalsymmetrical contour and provided with a tongue normally lying withinthe. lines of the wedge to conform to the symmetrical contour thereofand permitthe wedge to be driven into the forward end of a tool handlewithout mutilation of the material thereof by said tongue, the wedgebeing provided with a channel. leading fromv the outer end of the Wedge.and terminating opposite said tongue whereby a tool may be inserted insaid channel to engage and bend the tongue into themat'erial of thehandle after the wedge is driven into position.

WILLIAM L.- DYSART.

- U r I IALONZOI L. ADKINS.

